CVE-2021-32439
CVSS v3
7.8
HIGH
EPSS Score
1.3 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Buffer overflow in the stbl_AppendSize function in MP4Box in GPAC 1.0.1 allows attackers to cause a denial of service or execute arbitrary code via a crafted file.
Technical details
- Published
- 2021-08-11
Frequently asked questions
What is CVE-2021-32439?
Buffer overflow in the stbl_AppendSize function in MP4Box in GPAC 1.0.1 allows attackers to cause a denial of service or execute arbitrary code via a crafted file.
Is CVE-2021-32439 actively exploited?
Active exploitation of CVE-2021-32439 has not been confirmed. Its EPSS score was 1.3% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-32439?
CVE-2021-32439 has a CVSS v3 base score of 7.8 (HIGH severity).
Is CVE-2021-32439 affecting your environment?
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